Valve-remover.



O. E. STEWART.

VALVE REM AEPLIUA'K'ION FILED mm OVER.

memos, 0/9 (Kr/ii SZewam I 77 OR! F Y Fatented Oct. 13, 1914 WITNESSESUNITED STATES .ATENT OFFICE.

OLIVER E. STEWART, OF BROOKLYN, NEW YORK.

VALVE-REMOVER.

This invention relates to devices for re moving valves from engines andespecially gas engines, and consists .of a simple and inexpensive meansfor relievingthe valve stem of its spring pressure so that the keyconnecting same may be readily removed to allow the valve stem to passthrough the openin of the valve seat as will be more fully escribed inthe following specification, set forth in the claim and illustrated inthe drawings, wherein,-

Figure 1 is a view illustrating the valve connected with a four cylinderengine. Fig. 2 is a perspectii e view of the device, used to remove thevalve and stem.

In the drawing, the four valve chambers are designated as A, B, G and Dand the operating shaft 5 is driven in the usual manner and carries thecams 6, 7, 8 and 9, operating upon the push rods 10, through theirrollers 11 to elevate and lower same and open and close the valves. Atthe upper end of each push rod is an adjusting screw 12, against whichthe stem 13 abuts, being pressed down by a spring 14, bearing upon awasher 15 which is retained by the key 16. It frequently occurs that itis neces sary to remove one ofthe valves and in this case it isdifficult to remove the pressure of they spring 14 so that the key maybe removed in order to allow the stem to be passed through the openingin the bottom of the valve seat.

In orderto elevate the washer 15, a lifter 17 is provided and consistsof sheet metal having its front side 18 open, while the rear side isprovided with a slot 19 through which the key 16 may be removed.

Specification of Letters Patent.

' Patented Oct. 13, 1914.

Application filed December 13, 1911. Serial No. 685,485.

- In Fig. 1 the valve in the seat issh'own with its stem pressing uponthe screw 12,

and the roller 11 elevated to its highest.

point. In the valve B, the lifter 17 is shown as being inserted beneaththe washer 15, and as the shaft 5 rotates, the stem 13 of the valve seatC .is allowed to descend so that the key 16 is in position for removal.

. IVhen the key is removed through the opening 19, the stem 13 may thenbe pulled upward so as to pass through the various openings to allowofits removal and the spring 14 will'be supported by the lifter 17 asshown in connection with the valve D which has been removed'with itsstem, and the spring retained in its proper position and under tension.

With this simple device a gas engine may be readily taken, apart andrepairs made or new valves and stems inserted, and it is obvious thatthe exact construction is not confined to the device shown in Fig. 2 butany similar lifter which consists practically of a half cylinder with aslot in its rear side could be regarded as the equivalent of the deviceabove described.

hat I claim as new and desire to secure by Letters Patent is,

A valve lifter comprising asemi-cyli-ndrical thimble, of uniformtransverse thickness, the transverse sectional area of the space withinthe thimble being uniform throughout the length of the thimble, the

thimble being provided with a slot leading in from one edge and locatedopposite the Open side (if the thimble, said thimble having at its.opposite sides unbroken straight edges which extend the full length ofthe thimble.

In testimony whereof I affix my signature in presence of two witnesses.

OLIVER E. STEIVART. Witnesses James F. DUIIAMEL, THEO. H. FRIEND, Jr.

